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Essential University Physics
An iceberg has mass 138,000 tonnes ( 1 tonne $=$ $1000 \mathrm{~kg}$ ) and is composed of pure ice with density $917 \mathrm{~kg} / \mathrm{m}^{3}$ and entrained gravel from rock with density $2750 \mathrm{~kg} / \mathrm{m}^{3} .$ If $95.5 \%$ of the iceberg's volume is submerged, how much of its mass is ice and how much is rock? Take the density of seawater to be $1030 \mathrm{~kg} / \mathrm{m}^{3}$.